/Engine/Source/Runtime/AIModule/Classes/DataProviders/AIDataProvider_QueryParams.h
It allows defining simple parameters for running query, which are not tied to any specific pawn, but defined for every query execution.
class UAIDataProvider_QueryParams : public [UAIDataProvider](API\Runtime\AIModule\DataProviders\UAIDataProvider)
bool
BoolValue
float
FloatValue
int32
IntValue
FName
ParamName
Arbitrary name this query parameter will be exposed as to outside world (like BT nodes)